html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/1125#issuecomment-260996026,https://api.github.com/repos/pydata/xarray/issues/1125,260996026,MDEyOklzc3VlQ29tbWVudDI2MDk5NjAyNg==,1217238,2016-11-16T16:32:32Z,2016-11-16T16:32:32Z,MEMBER,"I can reproduce this on `master`.

Indeed, it seems like we need something like [`GroupBy._restore_dim_order`](https://github.com/pydata/xarray/blob/6c905831ef2befd305b95ad15b70feaafd3143cf/xarray/core/groupby.py#L422) for rolling aggregations.

CC @jhamman 
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